Rio Road, also signed county road 631, runs as "East Rio Road" from the Charlottesville-Albemarle county line, as an extension of Park Street, northward to Route 29. Crossing 29, it continues as "West Rio Road" until it ends at the intersection of Hydraulic Road and Earlysville Road.
It is a common route for motorists between the city and points north.
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Supervisor Brad Sheffield expressed concern at the February 10, 2016 meeting of the Board of Supervisors that the eastern portion of Rio Road is nearing residential build-out with the construction of Dunlora Forest, Treesdale Park and other residential developments.
Albemarle officials told the Board of Supervisors on February 10, 2016 they wanted to create a small-area plan in the vicinity of Rio Road and U.S. 29.  Both the county and the state have recently invested in the region, such as the $11.8 million new Northside Library. Albemarle received a grant from the Virginia Office of Intermodal Planning and Investment. That allowed for the hiring of the Renaissance Planning Group to begin work on community engagement, market analysis and a preliminary transportation analysis. 
- Web. Albemarle to prioritize infrastructure near U.S. 29 and Rio Road, Sean Tubbs, News Release, Charlottesville Tomorrow, February 10, 2016, retrieved December 29, 2016.
- Web. , Sean Tubbs, News Article, Charlottesville Tomorrow, March 2, 2016, retrieved December 31, 2016.
- Maurer, David A. "Mapping out Name Game Took Effort." The Daily Progress [Charlottesville] 29 Aug. 2010: C1. Print.